/* Validate QuantityNumber */
function validate_quantity(field) {
var valid = "123456789"
var ok = "yes";
var temp;
	for (var i=0; i<field.value.length; i++) {
		temp = "" + field.value.substring(i, i+1);
		if (valid.indexOf(temp) == "-1") ok = "no";
	}
	if (ok == "no") {
		alert("Invalid quantity! Only numbers are accepted.");
		field.select();
		field.focus();
	}
}

/* Copy Contact Details */
function copyContactDetails() {
  document.contactinfo.shipping_fname.value = document.contactinfo.contact_fname.value;
  document.contactinfo.shipping_lname.value = document.contactinfo.contact_lname.value;
  document.contactinfo.shipping_company.value = document.contactinfo.contact_company.value;
  document.contactinfo.shipping_address.value = document.contactinfo.contact_address.value;
  document.contactinfo.shipping_city.value = document.contactinfo.contact_city.value;
  document.contactinfo.shipping_state.value = document.contactinfo.contact_state.value;
  document.contactinfo.shipping_postcode.value = document.contactinfo.contact_postcode.value;
  document.contactinfo.shipping_country.value = document.contactinfo.contact_country.value;
  document.contactinfo.shipping_email.value = document.contactinfo.contact_email.value;
  document.contactinfo.shipping_phone.value = document.contactinfo.contact_phone.value;
  document.contactinfo.shipping_fax.value = document.contactinfo.contact_fax.value;
}